Lubrication device



July 9, 1935.

A. Y. DODGE 2,007,707

LUBRICATION DEVICE Filed Feb. 24, 1932 3 Sheets-Sheet 1 INVENTOR. 670/54 000a:

TTORNEY July 9, 1935. A. Y. DODGE 2,007,707

LUBRICATION DEVICE I Filed Feb. 24. 1932 s Sheets-Sheet 2 l8 l5 -5 a B 9 I3 39 I 62 52 I 0 0 2e 'INVENTOR.

ATTORNEY July 9, 1935 A. Y. DQDGE 2,007,707

LUBRICATION DEVICE Fied Feb. 24, 1932 :s Sheets-Sheet 3' r o v W c 5 j INVENTOR.

'- 7 QWRNEY;

Patented July 9, 1935 UNITED: sTA Es LUBRICATION :DEVICE,

Adiel Y. Dodge, South Bend,-'Ind.; assignor to The Lubrication Corporation, South Bend, Ind., a corporation of Delaware ApplicationFebruary 24, 1932, Serial No. 594,823

12 Claims.

This invention relates to lubrication devices and more particularly to power operated lubricant guns or pumps by means of which lubricant may be supplied under relatively high pressure to bearings and similar parts which are to be as to provide accessibility to the trigger of the sfi nge r ofthe supporting hand.

Another object is to provide, in a hand power operated lubricant gun, cartridge means for provlding a source of lubricant supply to the gun, having the additional function of serving as a manually enga'geable hand'grip.

Another object is to provide in a hand lubrican gun as described, a compact assembly of parts which is relatively light in weight and therefore one which will not-inconvenience or tire the operator of the gun during use.

Other objects, the advantages, and. the uses of the invention will be, or should become, apparent after reading the following description and claims and after consideration of theaccompanying drawings forminga part of thisspecification in which: I

Fig. 1 is a sectional view of an air operated lubricant gun illustrating an embodiment of my invention;

Fig. 2 is a sectional view taken along the line II-II of Fig. l;

Fig. 3 isa sectional view of a modified form v of the lubricant gun illustrated inFig. 1;

Fig. 4 is a rear elevation of the lubricant gun illustrated in Fig. -1;

Fig. 5 is a sectional view taken along the line V--V of Fig. 4;

. Figffi is a schematic viewillustrating the gun of Fig. 1 in one of its operative positions; and

Fig. 7 is a schematic view illustrating the gun supporting the gun, an automatic air valve D for with a whip end hose and nozzle.

the motor B, a throttle valve E for controlling the motor, a double action trigger F for actuating the throttle valve E and. a hand grip G for holding the gun suspended from the hand as when used Referring particularly to Fig. 1 the lubricant pump A comprises a body 2 having aligned bores 3 and 4 disposed longitudinally therein. The bore 4 comprises a pressure cylinder within which a pressure piston 5 is slidably disposed. The piston 5 is mounted upon and intermediate the ends ofa plunger rod 6. The outer end of the plunger'rod is slidably mounted within the bore 3 and the rearward end extends through a packing gland 1 into that region of the gun occupied by the air motor B, where it is secured to the piston 8, of the air motor, by nuts Biand Ill.

Lubricant is admitted to opposite ends of the bore or cylinder 4 through inlet check valves II and I2, of the ball type, bothof which communicate with an inlet passage l3 connected at its forward end to a tube l4 which forms the supporting core for the hand grip G and is adapted for connection at its lower end l5 supply hose.

Lubricant is discharged from the pump through outlet check valves l6 and 11, disposed at opposite ends of the cylinder 4, both of which communicate with a discharge bore l8 the outer end of which is internally threaded as shown at l 9;for interconnection with a discharge nozzle or with a lubricant conducting hose, to which a nozzle may be fixed.

The air motor B comprises a cylinder 2| disposed wi-th its axis aligned with the cylinder 4 and formed in the body 2 of the gun. The piston 8 is slidably mounted within the cylinder 2| and the rear end of the cylinder is closed by a screw plug 22. Air under pressure for operating the motor is admitted through a bore 23 formed in the pistol grip C, by connecting an air hose to the internally threaded portion 44 of the bore at the base of the hand grip. The upper end of the bore 23 communicates with the throttle valve E which is of'the-balhtype. The ball valve when lifted from its seat as by inward thrust upona valve rod 25, interconnects the bore 23 with a transverse passage 26 communicating with the interiorof the valve cylinder 2'l (see Fig. 5) of the automatic air valve D.

,The automatic air valve 1) comprises avalve member 28 slidably'disposed within the cylinder 21. This valve is actuated by exhaust air fromthe air motor B admitted" through passages 30 and 3| respectively, depending upon the position with a lubricant air'motorBmaybeoperatedto 86 rod :5, which registers with th trigger ."by the right hand or the operator so that it may I I tobe lubricated.

of the piston 8 in the motor cylinder 2|, so as to alternately open ports 32 and it respectively in thecylinder 2| through which air admitted from thee it is conducted to propel the piston t alternately forwardly and rearwardly, thus reciprocating the lubricant piston 5 in its cylinder 0. The valve member =28 is retained from rota tive movement by a stud 29. r

The structure of the pump A, the motor 3 and the automatic valve D is fully illustrated and described in detail in my copending application for patent, Serial No. 594,822, filed Feb. 24, 1932. The throttle valve E, for controlling the. air motor B through movement of the valveirod 25, is actuated by, a double action trigger F having a finger engaging portion 35 curved on opposite? sides to accommodate the finger during operation. The trig er F is further formed, at its inner end, with a pair of slots 36 and 31 through 20 check valve as, and, is secured to the body 2 of the gun in a threaded passage 66 communicating with the lubricant inlet-passage I I, of the pump A. The cartridge is disposed within a casing 51, the inner end it of which is adapted to bear directly upon the outer end ll of the cartridge, to force the cartridge inwardly ainst the stud 54, as the externally threaded upper end 80 of the casing is engaged with and screwed into an in-, ternally threaded cap 2 formed integral with the body 2 of the gun.

An air passage 63, communicating with the bore and shown partially in dotted lines in Fig. 3, is employeqto conduct air under pressure to the interior of the cap 62, where it may pass between ,the casing and cartridge wall and beheath the lower end 5! of the cartridge to apply air pressure to the rear surface of the cartridge piston 64. The lubricant in the cartridge 6| is which pins SI and 39 respectively extend. The thus maintained under pressureso as to aid its draw the trigger toward the hand grip G and i thus it will pivot about the pin II, In either case movement of the trigger F will cause the valve I F, at-that portion between the slots 36 and 31, to be moved inwardly to lift the ball valve E from its seat, against the action of a compression spring Ill.

I have thus provided. a hand. power operated lubricant gun (in the present instance, an air motor operated having two major applications in' use, as ollows:

First, that of a pistol type air gun, held by manual engagementwith the pistol grip C, and which may support a lubricant discharge nomle immediately connected with the internally threaded portion ll of the discharge bore ll.

Secondly, a lubricant feeder apparatus or pump which may beheld, as for instance in the left hand, and suspended from the hand by engagement withthehand grip G as shownin 6, with-a whip end lubricant hose 42 connected by an elbow 43 with the threaded orifice I! of the discharge bore It, and a discharge nozzle 44 connected to the outer end of the hose, to be directed be engaged with the lubricant fitting or nipple when used in either of the two, manners, the

drive the lubri-.- cant pump A continuously, by manually drawing the trigger F toward the hand grip employed for supporting-or suspending the gun, an arrangement which greatly facilitates the ease of operatlon and which provides versatility in use to suit the particular needs for which the gun is at the moment desired. "lung. 3 I have illustrated a modification of the 'gun illustrated in Fig. 1 wherein the lubricant, supply is self contained in the form of a replaceable lubricant cartridge II. The cartridge II has a head It provided with an outlet opening I! adapted to engage with a cartridge connector stud 54 so as to form a lubricant tight lealthu'ebetween. 'lhestudll,includesa ball discharge fromthe cartridge through the valve 55 into the lubricant inlet e I3. In order to assure the passage of air about the outer-end 5! .of the cartridge, a slight depression 6! is formed on the )nner .end wall 58 of the casing adjacent to the'casing side wall, to provide a bypass about the end it of the cartridge.

ln use the hand lubricant gun illustrated in Fig.3maybe,ixrthecaseoftheguiiillustratedin Fig. 1, employed for 'two major uses;

that of a pistol type air gun supported by manthe hand by manual engagement with the outer.

walls of the casing 51 with the finger free to operate the double action trigger F, in which case the whip'end hose 411s connected to the gun by an'elbow l3 and the nozzle 44 is disposed at the outer end'of the hose.

It is to be understood that the above described embodiments of the invention are for the purpose of illustration only, and various changes may be. made therein without departing .from the spirit and scope of the invention.

I claim: l

19A lubricant'feeder including in unitary assembly, alubricant pump, a motorfor actuating the pump, a' pair of hand grips for supporting and suspending the gun, respectively, by and from the hand of the operator, and a trigger, operated control for said motor having the trigger mechanism thereof within finger operative reachof both of said hand grips.

2. A lubricant feeder gun, a body, a lubricant feeder apparatus disposed in said body, a pair of hand grips for use, independently, in manually holding the .said hand grips having their axes substantially parallel, and a trigger mechanism within finger operative reach of both of said hand grips for controlling said feeder apparatus.

3. A lubricant feeder gun,- a body, a lubricant feeder apparatus disposed insaid body; a pair of hand grips for use, independently, in manually holding the gun, said hand grips having their axes substantially parallel, and a trigger mechanismwithin finger operative reach of both of said hand grips for controlling said feeder apparatus, one of said hand grips comprising a casing to confine a source of lubricant supply for said feeder apparatus;

04. A lubricant feeder gun comprising a lubrie cant pump, an air motor for driving said pump,

a throttle valvefor operating said air motor, a

trigger mechanism for actuating said valve, and means mounting said trigger for opening said valve when the trigger is moved in either of two opposite directions.

5. As an articleof manufacture, a double action trigger for imparting right line movement to a control rod comprising a trigger member having a manually engageable portion at one end and a pair of slots formed through the other end, two stationary pins, one extending through each of said slots, to form pivots severally for the trigger member, each slot being so arranged as to clear its associated pin when the trigger isports each'indepe'ndently operative to permit angular movement of, the trigger member, said member being further arranged to register that portion between its pivotal supports with the end of said control rod whereby pivotal movement of the trigger member on either of its pivotal supports will impart right line movement to said control rod.

'7. A lubricant feeder gun comprising an elongated body a lubricant pump, disposed within 'said body, means for operating said pump, a casing secured to said body for containing a source of lubricant supply for said pump, and a trigger for controlling said pump operating means, said casing extending outwardly and rearwardly from the forward end of said body and within finger reach of said trigger as when the gun is suspended from the hand of the operator by grasping the casing. I

8. In a lubricant feeder gun, an air motor operated and reciprocating lubricant pump, means including a control valve for conducting air under pressure to the air motor of said pump, a cartridge receiving casing disposed transversely of the path of reciprocation of said pump, a lubricant supply cartridge disposed in said casing and detachably connected atone of its ends in lubricant supplying relationship with respect to said pump, a follower forming a closure for the other end of said cartridge, and means for admittingair under pressure into said casing and against said follower for urging the follower against the lubricant in the cartridge and toward the pump, said means becoming effective substantially simultaneously with the opening of said air motor control valve, said casing being disposed adjacent to said air admitting means and serving as a supporting means for said gun. 9. A lubricant feeder gun comprising, an elongated body, a lubricant pump and a motor for driving the pump disposed in said body, a lubricant cartridge detachably secured to said body for supplying lubricant to said pump, a follower beingspaced from said cartridge sufficiently to permit access of air to said follower.

10. A lubricant feeder gun comprising, an elongatedbody, a lubricant pump and an air motor for driving said pump disposed in said body, a lubricant cartridge detachably secured to said body for supplying lubricant to said pump, a piston disposed in said cartridge and forming a cloof said cartridge providing a passageway for lubricant to flow from the cartridge to the pump,

a casing for housing said cartridge, said casing also serving as a hand grip for holding said lubricant gun, and means 'for conducting air under pressure to-the interior of said casing whereby to urge said cartridge piston toward said other end of said cartridge.

11. A lubricant feeder gun comprising an elon-. gated body, a lubricant pump, disposed within said body, means for operating said pump, .a casing secured to said body for containing a source of lubricant supply for said pump, a trigger for controlling said pump operating means, said casing extending outwardly and rearw ardly from the. forward end of said body and within finger reachnof said trigger as when the gun is suspended from the hand of the operator by grasping the casing, and a piston grip handle at the rear end being operable by the operator's trigger finger when the casing on the piston grip is' used as a handle.

12. In a lubricant feeder gun, an air motor 'of said body within finger reach of said trigger for supporting the gun in the hand, said trigger operated lubricant pump, means including an air supply conduit and a control valve for conducting air under pressure to the airmotor of said pump, a cartridge receiving casing secured by one end relatively to said pump, a lubricant supply cartridge disposed within said casing and detachably connected at one 'of its ends in lubri-,

cant supplying relationship with respect to said pump, a follower disposed in and forming a closure for the other end of said cartridge, and means for admitting air under pressure from said conduit into said casing and against said follower for urging the lubricant in the cartridge ADIEL Y. DODGE. 

